Typewriting machine



Oct. 28 I924. 1,512,988

I A. G. F. KUROWSKI TYPEWRITIING MACHINE Filed Ocfr- 20. 1919 2Sho'ots-Sheet 1 '//7 vmfor:

Patented Oct. 28, 1924.

UNITED PATENT oFFicE.

amass a. KUROWSKI, or; BROO LY new yoR- nssIGnoR TO nn RwooD TYPEWEITERCOMPANY, OF new YORK, n. Y.; A CORPORATION OF DELAWARE.

wsswmme Machine.

memes ii lea ember 20, 19119. seal No. 331,256.

To aZl 'wh0 1nit may concern:

Be it known that I, ALFRED G. F. KU owsin, a citizen of the UnitedStates, formerly a citizen of Germany, residing in Brooklyn Borough, inthe county of Klngs, city and State of New York, have invented certainnew and useful Improvements in Typewriting Machines, of which thefollowing is a specification. v

This invention relates to typewriting machines, and more particularly tomechanism for effecting relative movement between the platen and thewriting point ofthe machine, to enable the printing of charactersbetween the positions in which characters would be printed in the normaloperation of the machine.

In typewriting, it is a common occurrence to omit one or more lettersinthe body of 20 a word, or to omit a letter at the end. In

the first case, the error may be corrected by writing the letter inhalf-space position between two letters previously written, or

by erasing the word and rewriting it, with each of the letters displaceda half-space to the left in order to provide equal spaces between therewritten word and the preceding and following words. In the secondcase, the letter to be added may be halfspaced from the last letter ofthe word, so as to leave an interval between said letter and thefollowing word. Other errors of the same nature may be corrected in thesame general manner.

The principal object of this invention is to provide improved means forshifting the work a fraction of a letter-space with reference to theprinting point, and for controlling the positioning of the workrelatively to the printing point after such shifting has been effected.

In carrying out this invention, I mayproride pivots to receive the hubsof the arms connected to the escapem'ent rack, of such length that thecarriage may be moved longi tudinally with respect to the rack. To coirno the position of the'caifria'ge relative to therack, provision may bemade of a pin onone of said hubs, engaging iii a cam-slot in a slidesupported on the carriage, Means, including a finger-piece, may beprovided for actuating said slide, and also a spring for returning saidfinger-piece. I It will be seen that, by using fslides havin slots ofsuitable inclination, mechanism of this kind may be adapted for use withracks of different pitches.

Another feature resides in the provision in the margin-release lever ofa slot into which the pivot-pin of the lever projects, and of a springnormally pressing the margin-release lever against one side of the slidenear its forward end. It will be seen that,

upon actuating said slide, the margin-re ing position, and theconsequent release of the slide when the carriage is returned toposition to start a new line, 'due to the engagement of a lug on themargin-release lever with the right-hand margin-stop. By

operating the machine in this manner, di-

rect manual operation of the margin-release lever to release the slidemay be avoided;

Other features and advantages will hereinafter appear. I

In the accompanying drawings,

Figure 1 is a fragmentary side elevation, partly in section, showing myinvention as applied to an Underwood typewriting machine.

, Figure 2 is a perspective View of the slide shown in Figure 1.

Figure 3 is a fragmentary front elevation of a portion of the mechanismshown in Figure l.

Figure 4 is a plan View of the parts at the right of Figure 3, shown asturned onequarter around in clockwise direction.

Figure 5 is a view similar to Figure 3, but showing the parts indifferent positions.

Upon depression of the character-keys (not shown), type-bars]. will beswung up; w ardly and rearwardly to bring the thereon into engagementwith the pineaz, supported by means of an axle 3, in aplatenfi'arne at,Which,in turn, is supported in a typewriter oarriage Saidcarriage 5 ismounted for 'inovement transversely of the machine on front and rearrails 6 and 7, respectively, and is drawn towards the leftof the machineby n'eans of the usual strap 8 and spring drain 9. Movementof saidcariii carriage, and-normally inengagement with a pinion 12, which hasthe usual one-way connection with an escapement wheel 12?, theescapement wheel being controlled by the usual fast and loose dogs 13and 1%, respectively, mounted on a dog-rocker 15, supported on a pivot16. .Vhen an operated type-bar is a proaching the end of its, stroke, aheel i7 thereon will engage the usual universal frame 18, and tactuation the dog-rocker.

Provision is also made of a margin-stop 19, mounted for sliding movementon. a rod 20 andon'front rail 6, and held in position by ei'igagement ofa toothed j aw 21, forming part thereof, with teeth 22, formed on thefront of'rail 6. Said jaw is pivoted to the margin-stop proper and bewithdrawn from teeth 22, by means of a finger,- piece 23. lVhen thecarriage is returned to the position for starting a new line, a lug 2%on said margin-stop 19 will be engaged by a lug 25, carried by amargin-release lever 26, the head 27 of which projects upwardly througharslot 28 .in the front part of the carriage-frame.

hereby ct is desirable to provide means whereby a rel- 'ative movementof the carriage ai track '10 may be edected. To this end, shouleeredscrews 29, which carry the hubs 30 .of said arms 11, are'madeoftsnllicient lenoth to. enable movement of hubs 3O there-along, theposition of the carriage along the rackmember 10 being: determined bymeans of a pin or cam, follower ll on one of said hubs 30, engaging incam-slot $2 in a lug 83, offset from a slide 34-, formingcarriage-displacing member, which is slidably supported on the carriageby means of shouldered screws 35 engaging in slots 36.- It will be a menees not interfere n atei", with the li' ii ;;of rack 10, by means of theusual car ge-release-lever 37, A spring 38, connected to the slide 3% atits rear end andv toa pin on theca "riage, I

, the margin-release-lever 26 to its Figure 5 seen, in this connection,that rack 10 is held In carrying out the present -uwention, it"

e a; SQPYmaaee nea-ns of thestrap 8 and the spring drum 9, F orconvenience in operatingfslide 34, a linger-niece 39 is pivotallymounted on the riageframe byv means of a shouldered so ew -l-O,a 1d ascrew ll, fixed I lingerpiece 39', engages in a slot 4-2 in the'slide3e, said slot e2 being allow for the upward movement of the screw ll asthe finger-piece is swung about shouldered screw 4:0. It will be seenthat unless return of slide e is 'arevented by some other means, thespring 38 will restore the slide and linger-piece to their normalpositions.v

It has been found desirable to provide latching means, for maintainingthe slide in 1 operated position, to enable corrections to be withoutmanually holding the finger piece in operated position. To this end, theiargin-release-lever 26 is provided with a enlongated vertically to"sloteB, 1 ging the pivot of said levers pivot being here shown as ashouldered screw Normally the margin-releasecentric with the arc attheright-hand end" of slot all so that, with ,theqparts in their igure 3positions, the margin-releasedeve; may be actuated in the usual manner.Upon movement of the slide 3 th) the rear, however, themargin-release-lever 26 will be drawn to the right by means of a spring47, and its head 2'? will be :positioncd in front of the forward end/l6of slide 34, as

position will. displace lug 25 with reference to the. typewriter carria5, so that said lug t L 1 1: 25 will engage lag 2a Or, the'margm-stopbefore the carriage has reached the end of its return. movement, theresult being that movement of the lever 26 will be stopped,

and slide will be carried sufficiently to the right thereof to free itfrom the head 27., The slide will then be moved to its forward positionby springa38, and the forward end LetGof the slide will prevent movementof thea.margin-release lever 26 by the spring 417. in otherwords,movement fi le c rri ge, 0,- th position tostart, a

n engagement with screw 4%, due to -i Ii met in other ways.

Variations may be resorted to within the scope of the invention, andportions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism therefor including a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriageco-op'erating with said hubs and of suiiicient length to enable movementof said carriage relatively to said rack, and means to shift saidcarriage, comprising a pin on one of ,said hubs and a slide on saidcarriage provided with a cam slot into which said pin projects.

2. In a typewriting machine, in combination, a traveling carriage havingaligned pivots at opposite ends, escapement mechanism including a rack,arms fixed on said rack and provided with hubs to receive said pivots,said pivots being of sufficient length to permit movement of said hubslongitudinally thereof, means to move said can riage relatively to saidrack, including a slide supported on the carriage, and a spring :t'orrestoring said slide to normal position.

3. In a typewriting machine, in combina tion, a traveling carriage,escapein'ent mechanism including a rack, means, including a slide onsaidcarriage, to shift said carriage relatively to said rack, means urgingsaid slide in one direction, a margin-releaselever provided with a slot,a pin projecting into said slot, a springurging said lever against theside of said slide near the 'to'rward end thereof, so that said releaselever will move across the end of said slide upon movement of the slideto its actuated position, a lug on said margin-release-lever, and amargin stop positioned so as to engage said lug when said carriage ismoved to the right, and effect the withdrawal of saidmarginrelease'lever from the end of said slide to permit the returnthereof:

a. In a typewriting machine, in combination, a traveling carriage, anescap'ement mechanism therefor including a rack, arms connected, withsaid rack and having hubs at their free ends, pivots on said carriage.co-opferating with said hubs and of suiiici'ent length to enablemovement of said carriage relatively to said rack, and means to shiftsaid carriage comprising a movable mally holding said member in inactiveposition, means on one of said hubs engaging said cam member forshifting said carriage when the cam' member is moved, and means formoving said member against thexaction of said spring.

5. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism thereto'r mcludmg a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriagecooperating with said hubs and of suitici'ent length to enable movementof said carriage relatively to said rack and laterally of the machine,and means to shift said carriage laterally comprising a camv member onsaid carriage movable forwardly and rearwardly, and normally in forwardposition. means on "one of said. hubs engaging said member for shiftingsaid carriage when the cam member is moved rearwardly, and means formoving said member rearwardly.

6. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism therefor including a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriageco-operating with said hubs and of sufiici'entlength to enable movementof said carriage relatively to said rack and laterally oi thei'nacl'iine, and means to shift said car riage laterally comprising acam member on said carriage movable forwardly and rearwardly, a springnormally holding said member in its forward position, means on one ofsaid hubs engaging said member for shifting said carriage when the cammember is moved rearwardly, andmeans for moving said member rearwa-rdlyagainst the action of said spring. 7; in a .typewriting machine, incombination, a traveling carriage, an esca-pement mechanism thereforincluding a rack, arms connected with said rack and havinghubs at theirfree ends, pivots on said carriage cooperating with said hubs and ofsutfi'cient length-to enable movement of said carriage relatively tosaid rack, means to shift said carriage comprising a movable cam memberon said carriage, a spring normally holding said member in inactiveposition, means on one of said hubs engaging said on m memberrmshi'l'ting said carriage when the cam member is moved, and means formoving saidmember against the action of said spring, and a latchslidably mounted on said carriage and adapted to hold said mem- .ber inmoved position, said latch being movable to allow said member to returnto inactive position. g

8. In a typewritingmachine, iii combination, a. traveling carriage,escapment mechanism therefor including a rack, arms connected with saidrack and h'avi-nglhubs .c'am member on said carriage, a spring norattheir free "ends, pivots on said carriage oo-operating with said hubsand of sufficient length to enable movement of said carriage relativelyto said rack, means to shift said. carriage comprising a movable cammember on said carriage, a spring normally holdingsaid member ininactive position, means on one of said hubs engaging said cam memberfor shifting said carriage when the cam member is moved, and means formoving said member against the action of said spring, a latch slidablymounted on the carria e for movement laterally thereof, and a secondspring normally pressing said-latch in a direction to hold said memberin moved position, said latch being movable against the action of saidsecond spring to allow said member to return to inactive position.

9. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism therefor including a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriageco-operating with said hubs and of sufficient length to enable movementof said carriage relatively to said rack and late-rally of the machine,means to shift said carriage laterally comprising a cam member on saidcarriage movable forwardly and rearwardly, and normally in forwardposition, means on one of said hubs engaging said member for shiftingsaid carriage when the cam member is moved rearwardly, and means formoving said member rearwardly, and a latch slidably mounted on saidcarriage, said latch being adapted to engage in front of said memberwhen the latter is moved rearwardly, said latch being movable to releasesaid cammember and allow it to return to its forward position.

10. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism therefor includmg a rack, arms connected with saidrack and having hubs at their free ends, plvots on said carriagecooperating with said hubs and of sufficient :length to enable movementof said carriage relatively to said rack and laterally of the machine,means to shift said carriage laterally comprising a cam member on saidcarriage movable forwardly and rearwardly, and normally in forwardposition, means .on one of said hubs engaging said member for shiftingsaid carriage when the cam member is moved rearwardly, and means formoving said member rearwardly, a latch slidably mounted on saidcarriage, and a spring tending to move said latch in front of saidmember, said latch engaging in front of said member when the latter ismoved rearwardly, said latch being movable against the action of saidspring to release said cam member and allow it to return to itsforwardposition.

. 11. In a typewriting machine, in combination, a traveling carriage, anescapement mechanism therefor including a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriageco-operating with said hubs and of suficient length to enable movementof said carriage relatively to said rack and laterally of the machine,means to shift said carriage laterally comprising a cam'member on saidcarriage movable forwardly and rearwardly, and normally in forwardposition, means on one of said hubs engaging said'member for shiftingsaid carriage when the cam member is moved rearwardly, and means formoving said member rearwardly, a margin-' release-lever slidably mountedon said carriage, one end of said lever being adapted to engage in frontof said member when the latter is moved rearwardly to hold the member inrearward positiolnand a margin-stop on the machine adapted to engage theother end of said lever when the carriage is retracted to its initialposition to withdraw said latch and allow the cam member toreturn to itsforward position.

12. In a typewriting, machine, in combination, traveling carriage, anescapement mechanismtherefor including a rack, arms connected with saidrack and having hubs at their free ends, pivots on said carriageco-operating with said hubs and of sufficient length to enable movementof said carriage relatively to said rack and laterally of the machine,means to shift said carriage laterally comprising a cam member on saidcarriage movable forwardly and rearwardly, and normally in forwardposition, means on one of said hubs engaging said member for shiftingsaid carriage when the cam member is moved rearwardly, and means formoving said member rearwardly, a margin-releasse-lever slidably mounted,on said carriage, one end of said lever being adapted to engage infront of'said member when the latter is moved rearwardly to hold themember in rearward position, a spring tending to move said end to engagein front of said member, and a margin-stop on the machine adapted toengage the other end of said lever when the carriage is retracted toitsinitial position, said carriage being movable after said margin-stop hasengaged said other end of the lever to move said cam member beyond saidfirst end of the lever and out of engagement therewith to allow saidmember to return to its forward position. I

13. In a typewriting machine, in combination, a main frame, aplaten-carrying carcarriage-displacing member having a cam formedthereon and mounted on said car riage for backward and forward movementthereon, a restoring spring for said carriage displacing member tendingto maintain it at one of the limits of its movement, a cam-followercarried by said rack-member and havmg a movable connection with said camfor displacing said carriage along said rackmember by the movement ofsaid carriagedisplacing member against the tension of its restoringspring, a spring-pressed latch on said carriage automatically engageablewith said carriage-displacing member to hold it against being returnedby said restoring spring, and a latch-releasing lug on said main framein the path of said latch to be engaged thereby to release said latchwhen said carriage is returned for beginning a new line.

14. In a typewriting machine, in combination, a main frame, aplaten-carrying carriage to travel thereon, an escapement mechanism forsaid carriage including a rack-member having a movable connection withsaid carriage to permit longitudinal movement of said carriageindependent of similar movement of said rack-member, acarriage-displacing slide-member mounted for a limited backward andforward sliding movement on said carriage, a restoring spring for saidcarriage-displacing slidemember tending to maintain it at one of itslimits of movement, carriage-displacing connections between saidcarriage-displacing slide-member and said rack to be operated by movingsaid carriage-displacing slidemember against the tension of itsrestoring spring, a spring-pressed latch on said carriage automaticallyengageable directly with said carriage-displacing slide-member to holdit against being returned by said restoring spring, and alatch-releasing lug on said main frame in the path of said latch toengage and release said latch when said carriage is returned forbeginning a new line.

ALFRED G. F. KUROl/VSKI. Witnesses LEWIS E. WEBER, EDITH B. LIBBEY.

